Improvement in millstone-cooling apparatus



W. DANIELS. 2 Sheets-Sheet 1. Millstone-Oobling Apparatus.

No. 204,542. Patented June 4,1878..

Film 1 W j %M7, W MmcM-L N PETERS. PHDMUTHOGIAPHER. WASHING'VON. D C.

2 Sheets-Sheet 2.

PATENT OFFICE.

WILLIAM DANIELS, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN MlLLSTONE-COOLING APPARATUS.

Specification forming part of Letters Patent N 0.

May 15,

To all whom it may concern:

Be it known that I, WILLIAM DANIELS, of Brooklyn, in the county of Kingsand in the State of New York, have invented certain new and usefulImprovements in Devices for Coolin g Millstones; and dohereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangementof a device for cooling millstones, as will be hereinafter more fullyset forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawings, in which-Figure 1 is a side elevation, partly in section, of a grinding-millembodying my invention. Fig. 2 is a central vertical section of thesame.

A represents the framework of themill. B is'the upperor stationarystone, and G the lower or running stone. D D represent circular castingsof the same size as the stones, each casting being formed with ribs (1 aor their equivalents for supporting the stones. The stones are fittedtothese castings, andmadefast by shrinking on a heavy wrought-iron band,F. There is thus formed an air-chamber, b, by the casting on one side,and the stone on the other, through which cold air can pass and come incontact with the entire surface of the stone, except where it is incontact with the ribs a.

The air is forced by means of a fan, G, connected by pipes or hose, intothe chamber of the bottom or running stone 0 down through 204,542, datedJune 4, 1878; application filed 1878.

intersected by small holes a: 00 leading into the air-chamber anddischarging through holes 3 at the verge or skirt of the casting. To the1 top or stationary stone the air is supplied at J and discharged at t.

It represents a refrigerator containing a coil of pipe, P, which isconnected to the fan, and throfigh which it receives its supply of air.This refrigerator is to be used in hot weather and warm climates, and isto be cooled with ice or chemicals used for producing cold or anyfreezing mixture.

The mill shown in the drawings is slightly conical, and is intended forgrinding paints; but my invention is applicable to all forms of mills,conical and flat, both top and under runners, also vertical and rollermills. The air-chamber in the roller-mill is formed by making therollers hollow, the air to be forced in through a hollow shaft orspindle.

The stone-supporters a in the air-chambers may be made in the shape ofrings, posts, or ribs, or in any manner not obstructing the free passageof air.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The combination of grinding stones provided with interior air-chambers,a fan or bellows, a refrigerator with coiled pipe cooled with ice orother material, and pipes or hose connecting the coiled pipe with thefan and the fan with the air-chambers, for the purposes herein setforth.

In testimony that I claim the foregoing I have hereunto set my hand this26th day of April, 1878.

WM. DANIELS.

Witnesses J. W. DANIELS,

the shaft or spindle H, the hollow of which is J 0s. H. BURRILL.

